Concrete reenforcing bond and connecter



1927. Apnl F. REBELL CONCRETE REENFORCING BOND AND CONNEOTER Filed Juneso. 1925 Mntoz F. RE'be'Ll Patented Apr. 12, 1927.

- tense Pars r, QgFFIC E.

. rnnn REBELL, ornon'ri-i sna tenant AUSTRALIA.

"ooncitnr n nnnn'roncme T onn nn conNnoTER.

Application filed June 30, 1e25,'seria1 ma am, :and in AustraliaSeptember 22, 1924.

Heretofore it has been customary to weld or tie the" reenfo rcing meansof concrete slabs together and to cement concrete or other plastic slabsat their interconnections,

. andit is this construction that the present inventions aims to avoidand yet at the sametime to construct a concrete; wall of plasticmaterial'not only insuring greater strength in the concrete or cementbut also insuring considerable strength in the bond or'reenforcement,especiallywhere the slabs'are fabricated, r d Anotherpurpose is toprovide, in a con Crete; building slab, an improved bond V, for theslab'itself aswell as a secure bond be tweenthe slabs, the slabs tobeconveniently cast, in shallow molds or frames flat on the ground orfloor 'orone over another, there being suitable-lugs fixed to the frameat regulanintervals toform gaps in the edges of the slabs to hold thebonds or reenforcing rods in position. This method is equally applicableto concrete beams, columns, pipes, etc, and particularly for use inithe"con- 'struction of buildings, silos, bridges, etc;-

Still-another purpose is to provide an improved and/secure interlockingbetween the bonding of the slabs, where two are edgewise adjacentandwhere "a third slab is positioned at; right angles to the edgewiseadjacent slabs, the third slab overlying the joint between-the first'two slabs, it being possible thatwhen thefslabs are so connected, thegaps or notches in the'sla'bsmay be closed by cement or-other plasticmaterial.

It is to be understood that theparticulars,

herein given are in no Way limitative and that, While still keepingWithin the scope of the invention; any desired modifications of detailand desired proporti'ons' may be made in the-apparatus 'accord ng to thecircumstances;

set forth, shown The; invention comprises further features andcombinations of'parts t-ojbe hereinafter in the drawings and claimed Qy. 1

In thedra'wings zg t v Figure 1 is a view inelevati'on of portions oftwoedgewiseadjacent slabs, the edges thereof being slightly spacedapart.

Figure 2 is 1a sectional view through edgewise adjacent'slabs, showingthe bonding of the two slabs connect-ed, curved 'boltsbeing employedfor-this purpose.

Figure 3 is a; sectional View through two edge'wise" adjacent slabs anda 'third slab at right angles'to the first two slabs, with its edgeoverlying the joint or adjacent .Figure 4; shows views of the characterof bolts that may be used. K d v Figuree-isa sectional view similar toFig ureabutshowing placed in position blocks or strips acting to holdthe loose concrete or motar during the filling operation.

broken-away showing {a form of moldj for making the slab constitutingthe invention.

toothed, serrated or otherwiseiot1ghened,

as indicated at 3, so as to insure holding the'slabs in position untilthey arebonded together.

In constructing concrete or cement slabs of this character, it isthepurpose to use shallow molds or frames position'flat on the ground orfloor or one over another.

WVhile the molds or framesare designed to be shallow, it is obvious thatthey may be any depth-or. any size'or shape. However, atregular-intervals, affixed to the inner faces of the sidesof the moldsor frames are suitablelugse which form gaps or notches 5 in the marginaledges of the'concrete slal when the same is complete and set.

"These lugst are hollowed out, as shown at 6, for the reception of-t'helooped ends 7- of the bonding rods are reenforcements 8.

In other Words, when molding 'a' concrete or cement slab, asdisclos ed,the longitudinal and transverse. bonding rods S are placed in position,said-lbondings being interwoven around-the bondings, and due to theprovision of the lugs 4, tl1e slabs will have, when completelygmoldedand set, gaps or notches 5. The loops 7 of the bondings have theirentremities'rl'flush" with these serrated or "toothed edges of; theslabs, so as. notv to -invterfere :with :theedges of the slabs when tbegslab a pla ed iii p sit en- Figurefijis adetail perspective view partly'withjtheirjloopsfi resting in the. hollowed outijportions 6 of the'lugs4. The concrete, "cement or: other plasticmaterial-"is then poured intothe mold,',thereby filling up As shown in Figures 1 and 2, it is thepurpose to connect or bond the loops 7 of the bondings together and inthe present case it is the aim to use curved bolts 9, such as shown inFigures 2 and 3. It is obvious that the bolts may bemade in any shapesso as to hold and secure concrete or cement or other plastic slabstogether and in various positions. However, where the slabs are heldedgewise adjacent each other, as in Figure 2, the bolts 9 are curvedsemicircular, that is, the shanks of the bolts, so as to accommodate theshanks to the position of theloops of the bondings. As shown, the headof the bolt bears against one loop while a nut 10 is threaded on theother end of the bolt to not only hold the bolt in place but also toconnect the bonds.

v The toothed or serrated edges of the slabs prevent movement ordisplacement of the slabs, particularly until the slabs are connected orunited. After uniting the slabs in this way, it is possible to fill upthe gaps or notches 5 and the spaces between the serrated edges withconcrete, cement or other plastic material in order to insure a solidWall.

As disclosed in Figure 3, a third slab is positioned with one of itsedges adjacent the faces of two edgewise adjacent slabs, the third slab11 also being provided with the bonding designated by the same characteras in the other figures, and to hold this third slab in position, anadditional bolt 12 is provided. The shank of this bolt has a slightcurve at a point in close proximity to the head of the bolt, so that thegreater portion of the shank may assumea position, as in Figure 3,whereby the nut 13 may bear upon the loop of one of the bondings and inturn upon the head of a bolt 9. This not only holds the bolt 9 inposition until its nut ,or other fastening means '10 is screwed on butinsures a rigid union between the several slabs. I

As previously stated, the notches or gaps 5 can receive a filler ofconcrete or cement to insure a solid union between the slabs of one walland the slabs of a wall at right angles thereto. It is obvious that thebolts may be bent in any shape to suitthe purpose, that is, thepositions of the walls.

A further reason for serrating or roughening theedges of the slabs is tomainly increase bonding and cementing between the slabs and to allow thepenetration of the cementing medium or grout (which is rather thick butsemi-fluid in consistency) without the necessity of the interposition ofa separating medium.

The reason for the reenforcement loops not protruding beyond the edge ofthe slab is to prevent the former from displacement or bending inhandling or transporting of the slabs, also to allow the tensioning ofthe reenforc-ement (by tightening the nuts) in the joints without thenecessity of a separating medium between the slabs.

Where three slabs are joined in a common joint, the bolts mentionedalternate from right to left (heads versus nuts) every succeeding notchor gap, the stability of the connection being such that simple slabswith as little as three notches can be connected perfectly rigid (bybolts) even without cementing them together. This mode of connectionalso allows the tensionrng of the re enforcement in the joint (bytightenmg the nuts), thus obviating or minimizing the tendency of crackformation along joints, possibly caused by contraction and expansion ofthe slabs and vibration and laxity of bond connections which may lead tocorrosion and failure of the bonds in the crack.

While in Figure 5 the construction is simithe slabs 1 and 2 to preventthe loss of the cement or grout. The rods 14 also pass through woodstrips 16 which are triangular in cross section and are disposed in thecorners adjacent where the slab 11 connects with the slabs 1 and 2, alsoacting to prevent the loss of the cement or grout. Suitable wedges 17connect with theends of the rods 14 which are slotted to receive thewedges,'thereby retaining them in position and holding the loops 18 ofthe rods againstthe Wood strip 15. The strips 15 and 16 serve astemporary mold walls at the joint to retain the grout or concrete orcement when being poured to fill the joint.

The invention having been set forth, what is claimed is: I

1. In a building construction, aplurality of building slabs, certain ofwhich are edgewise united, others of which havingitheir edge portionsoverlying the united edge portions of the first slabs, the edgewiseunited slabs having notches or openings, bondings embedded in the slaband having loops located in the notches, means connecting the loops, theslab with its edge overlying said united edges having bondings, meansconnecting the last bondings with certain of the loops of the firstbondings, wood fillers in the corners adjacent the slab which overliesthe edgewise united slabs, and means passing through the joint of theseveral slabs and through the fillers for bonding the structuretogether.

2. In a building construction, a plurality of building sla'bs, certainof which are edgewise united and provided with bondings embeddedtherein, others ofthe slabs having bondings and overlying the unitededges o1 the first slabs, means for connecting the the slab overlyingthe joint between the edgewise united slabs, a Wood cover stripoverlying the joint of the edgewise united slabs, and means passingthrough the cover strip and the joint between the severalslabs andthrough the fillers to insure rigidity.

3. In combination with the block elements of a masonry construction, amechanical bond consisting of reenfor'cing rods embedded'in. saidelements and provided with loop terminals and bent bolts spanning andengaging the loops ofthe rods of adjacent elements, and nuts attachedtothe bolts at one extremity and bearing upon the loops for tensioning therods when the nuts are tightened. I e

In testimony whereof he aflixes his signature.

FRED .REBELL.

